Merge pull request #272 from tkchia/tkchia/20220826
plat/msdos386: refactor, firm up, and optimize
This commit is contained in:
David Given
GitHub
commit
8619ce3ada
|
|
@ -91,7 +91,7 @@ begtext:
|
|||
! Copy the whole thing into 32-bit memory.
|
||||
|
||||
mov ecx, 0x100/4
|
||||
mov edi, _psp
|
||||
mov edi, .psp
|
||||
cld
|
||||
1:
|
||||
eseg lods
|
||||
|
|
@ -101,7 +101,7 @@ begtext:
|
|||
|
||||
! Find the environment.
|
||||
|
||||
mov es, (_psp + 0x002C) ! converted to pmode segment
|
||||
mov es, (.psp + 0x002C) ! converted to pmode segment
|
||||
|
||||
! Count the size of the environment variable block.
|
||||
|
||||
|
|
@ -155,7 +155,7 @@ empty_environment:
|
|||
push 3 ! MS-DOS version
|
||||
push ecx ! env. string data
|
||||
push edx ! count of env. vars.
|
||||
push _psp+0x80 ! raw command line
|
||||
push .psp+0x80 ! raw command line
|
||||
call __sys_initmain
|
||||
add esp, 5*4
|
||||
|
||||
|
|
@ -225,7 +225,7 @@ no_room_msg: .ascii 'No room$'
|
|||
.comm _errno, 4
|
||||
|
||||
.comm .doshandle, 2
|
||||
.comm _psp, 256
|
||||
.comm .psp, 256
|
||||
|
||||
.sect .bss
|
||||
.space 32*1024
|
||||
|
|
|
|||
|
|
@ -9,6 +9,7 @@ ackfile {
|
|||
ackfile {
|
||||
name = "stub",
|
||||
srcs = { "./stub.s" },
|
||||
deps = { "plat/msdos386/libsys+headers" },
|
||||
vars = { plat = "msdos386" }
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -3,12 +3,7 @@
|
|||
! $State$
|
||||
! $Revision$
|
||||
|
||||
! Declare segments (the order is important).
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
#include "libsysasm.h"
|
||||
|
||||
.sect .bss
|
||||
|
||||
|
|
|
|||
|
|
@ -1,11 +1,9 @@
|
|||
! Declare segments (the order is important).
|
||||
#
|
||||
! $Source$
|
||||
! $State$
|
||||
! $Revision$
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
|
||||
.sect .text
|
||||
#include "libsysasm.h"
|
||||
|
||||
.define _brk
|
||||
_brk:
|
||||
|
|
|
|||
|
|
@ -1,3 +1,10 @@
|
|||
bundle {
|
||||
name = "headers",
|
||||
srcs = {
|
||||
"./libsysasm.h"
|
||||
}
|
||||
}
|
||||
|
||||
acklibrary {
|
||||
name = "lib",
|
||||
srcs = {
|
||||
|
|
@ -9,6 +16,9 @@ acklibrary {
|
|||
"./isatty.s",
|
||||
"./rename.s",
|
||||
"./sbrk.c",
|
||||
"./sys_cpyin.s",
|
||||
"./sys_cpyout.s",
|
||||
"./sys_dpmidos.s",
|
||||
"./sys_exists.s",
|
||||
"./sys_getdate.s",
|
||||
"./sys_gettime.s",
|
||||
|
|
@ -19,17 +29,16 @@ acklibrary {
|
|||
"./sys_rawopen.s",
|
||||
"./sys_rawread.s",
|
||||
"./sys_rawwrite.s",
|
||||
"./sys_scpyout.s",
|
||||
"./sys_xret.s",
|
||||
"./unlink.s",
|
||||
"plat/msdos/libsys+srcs",
|
||||
},
|
||||
deps = {
|
||||
"lang/cem/libcc.ansi/headers+headers",
|
||||
"plat/msdos386/include+headers",
|
||||
"plat/msdos/libsys+headers",
|
||||
"+headers"
|
||||
},
|
||||
vars = {
|
||||
plat = "msdos386"
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -3,14 +3,7 @@
|
|||
! $State$
|
||||
! $Revision$
|
||||
|
||||
! Declare segments (the order is important).
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
|
||||
.sect .text
|
||||
#include "libsysasm.h"
|
||||
|
||||
! Close a file.
|
||||
|
||||
|
|
|
|||
|
|
@ -3,12 +3,7 @@
|
|||
! $State$
|
||||
! $Revision$
|
||||
|
||||
! Declare segments (the order is important).
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
#include "libsysasm.h"
|
||||
|
||||
#define D(e) .define e; e
|
||||
|
||||
|
|
|
|||
|
|
@ -15,14 +15,7 @@
|
|||
! the new terms are clearly indicated on the first page of each file where
|
||||
! they apply.
|
||||
|
||||
! Declare segments (the order is important).
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
|
||||
.sect .text
|
||||
#include "libsysasm.h"
|
||||
|
||||
! Get the current process identifier. For MS-DOS, use the Program Segment
|
||||
! Prefix (PSP) segment as the PID, unless the system supports an actual
|
||||
|
|
|
|||
|
|
@ -3,14 +3,7 @@
|
|||
! $State$
|
||||
! $Revision$
|
||||
|
||||
! Declare segments (the order is important).
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
|
||||
.sect .text
|
||||
#include "libsysasm.h"
|
||||
|
||||
! Say whether a given file descriptor number refers to a terminal.
|
||||
|
||||
|
|
|
|||
24
plat/msdos386/libsys/libsysasm.h
Normal file
24
plat/msdos386/libsys/libsysasm.h
Normal file
|
|
@ -0,0 +1,24 @@
|
|||
/*
|
||||
* © 2013 David Given
|
||||
* © 2022 TK Chia
|
||||
* This file is redistributable under the terms of the 3-clause BSD license.
|
||||
* See the file 'Copying' in the root of the distribution for the full text.
|
||||
*/
|
||||
|
||||
#ifndef LIBSYSASM_H
|
||||
#define LIBSYSASM_H
|
||||
|
||||
! Declare segments (the order is important).
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
|
||||
.sect .text
|
||||
|
||||
! Size of transfer buffer, for 32-bit DPMI mode.
|
||||
|
||||
TRANSFER_BUFFER_SIZE = 32 * 1024
|
||||
|
||||
#endif
|
||||
|
|
@ -3,54 +3,40 @@
|
|||
! $State$
|
||||
! $Revision$
|
||||
|
||||
! Declare segments (the order is important).
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
|
||||
.sect .text
|
||||
#include "libsysasm.h"
|
||||
|
||||
! Rename a file.
|
||||
|
||||
.define _rename
|
||||
_rename:
|
||||
mov ebx, esp
|
||||
push esi
|
||||
push edi
|
||||
|
||||
! Source filename.
|
||||
|
||||
mov esi, 4(ebx)
|
||||
movzx edi, (transfer_buffer_ptr)
|
||||
mov es, (pmode_ds)
|
||||
cld
|
||||
1:
|
||||
lodsb
|
||||
stosb
|
||||
testb al, al
|
||||
jnz 1b
|
||||
|
||||
! Destination filename.
|
||||
|
||||
mov eax, edi
|
||||
mov esi, 8(ebx)
|
||||
1:
|
||||
lodsb
|
||||
stosb
|
||||
testb al, al
|
||||
jnz 1b
|
||||
mov eax, 4+8(esp)
|
||||
#define DEST_NAME_OFFSET (TRANSFER_BUFFER_SIZE / 2)
|
||||
mov edx, DEST_NAME_OFFSET
|
||||
mov ecx, edx
|
||||
call .sys_sncpyout
|
||||
jc 9f
|
||||
xchg edi, eax
|
||||
|
||||
! Source filename.
|
||||
|
||||
mov eax, 4+4(esp)
|
||||
xor edx, edx
|
||||
call .sys_sncpyout
|
||||
jc 9f
|
||||
xchg edx, eax
|
||||
|
||||
! Make the DOS call.
|
||||
|
||||
o16 mov dx, (transfer_buffer_ptr)
|
||||
o16 mov di, ax
|
||||
movb ah, 0x56
|
||||
mov ebx, 0x210000
|
||||
callf (interrupt_ptr)
|
||||
call .sys_dpmidos
|
||||
|
||||
pop edi
|
||||
pop esi
|
||||
push ss
|
||||
pop es
|
||||
jmp .sys_zret
|
||||
|
||||
9:
|
||||
pop edi
|
||||
jmp .sys_toolongret
|
||||
|
|
|
|||
32
plat/msdos386/libsys/sys_cpyin.s
Normal file
32
plat/msdos386/libsys/sys_cpyin.s
Normal file
|
|
@ -0,0 +1,32 @@
|
|||
#
|
||||
! $Source$
|
||||
! $State$
|
||||
! $Revision$
|
||||
|
||||
#include "libsysasm.h"
|
||||
|
||||
! .sys_cpyin: copy ecx bytes from the transfer buffer to es:eax (= ds:eax).
|
||||
! Preserve all registers, except the flags.
|
||||
|
||||
.extern .sys_cpyin
|
||||
.sys_cpyin:
|
||||
push eax
|
||||
push ecx
|
||||
push esi
|
||||
push edi
|
||||
movzx esi, (transfer_buffer_ptr)
|
||||
xchg edi, eax
|
||||
mov ds, (pmode_ds)
|
||||
mov eax, ecx
|
||||
shr ecx, 2
|
||||
rep movs
|
||||
andb al, 3
|
||||
movb cl, al
|
||||
rep movsb
|
||||
mov eax, ss
|
||||
mov ds, eax
|
||||
pop edi
|
||||
pop esi
|
||||
pop ecx
|
||||
pop eax
|
||||
ret
|
||||
34
plat/msdos386/libsys/sys_cpyout.s
Normal file
34
plat/msdos386/libsys/sys_cpyout.s
Normal file
|
|
@ -0,0 +1,34 @@
|
|||
#
|
||||
! $Source$
|
||||
! $State$
|
||||
! $Revision$
|
||||
|
||||
#include "libsysasm.h"
|
||||
|
||||
! .sys_cpyout: copy ecx bytes starting from ds:eax to the transfer
|
||||
! buffer. Return eax := offset of transfer buffer in the real mode data
|
||||
! segment. Preserve all other registers, except the flags.
|
||||
|
||||
.extern .sys_cpyout
|
||||
.sys_cpyout:
|
||||
push ecx
|
||||
push edx
|
||||
push esi
|
||||
push edi
|
||||
xchg esi, eax
|
||||
movzx edi, (transfer_buffer_ptr)
|
||||
mov eax, edi
|
||||
mov es, (pmode_ds)
|
||||
mov edx, ecx
|
||||
shr ecx, 2
|
||||
rep movs
|
||||
movb cl, dl
|
||||
andb cl, 3
|
||||
rep movsb
|
||||
mov ecx, ss
|
||||
mov es, ecx
|
||||
pop edi
|
||||
pop esi
|
||||
pop edx
|
||||
pop ecx
|
||||
ret
|
||||
16
plat/msdos386/libsys/sys_dpmidos.s
Normal file
16
plat/msdos386/libsys/sys_dpmidos.s
Normal file
|
|
@ -0,0 +1,16 @@
|
|||
#
|
||||
! $Source$
|
||||
! $State$
|
||||
! $Revision$
|
||||
|
||||
#include "libsysasm.h"
|
||||
|
||||
! .sys_dpmidos: simulate a call to real-mode int 0x21 with the current
|
||||
! 16-bit register values.
|
||||
|
||||
.extern .sys_dpmidos
|
||||
.sys_dpmidos:
|
||||
movzx ebx, bx
|
||||
or ebx, 0x210000
|
||||
callf (interrupt_ptr)
|
||||
ret
|
||||
|
|
@ -3,35 +3,19 @@
|
|||
! $State$
|
||||
! $Revision$
|
||||
|
||||
! Declare segments (the order is important).
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
|
||||
.sect .text
|
||||
#include "libsysasm.h"
|
||||
|
||||
! Say whether a file exists with the given name.
|
||||
|
||||
.define __sys_exists
|
||||
__sys_exists:
|
||||
push esi
|
||||
mov esi, 4+4(esp)
|
||||
movzx edi, (transfer_buffer_ptr)
|
||||
mov edx, edi
|
||||
mov es, (pmode_ds)
|
||||
cld
|
||||
1:
|
||||
lodsb
|
||||
stosb
|
||||
testb al, al
|
||||
jnz 1b
|
||||
mov eax, 4(esp)
|
||||
call .sys_scpyout
|
||||
jc 9f
|
||||
xchg edx, eax
|
||||
mov eax, 0x4300
|
||||
mov ebx, 0x210000
|
||||
callf (interrupt_ptr)
|
||||
push ss
|
||||
pop es
|
||||
call .sys_dpmidos
|
||||
9:
|
||||
sbb eax, eax
|
||||
inc eax
|
||||
ret
|
||||
|
|
|
|||
|
|
@ -3,14 +3,7 @@
|
|||
! $State$
|
||||
! $Revision$
|
||||
|
||||
! Declare segments (the order is important).
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
|
||||
.sect .text
|
||||
#include "libsysasm.h"
|
||||
|
||||
! Get the current system date from MS-DOS.
|
||||
|
||||
|
|
|
|||
|
|
@ -3,14 +3,7 @@
|
|||
! $State$
|
||||
! $Revision$
|
||||
|
||||
! Declare segments (the order is important).
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
|
||||
.sect .text
|
||||
#include "libsysasm.h"
|
||||
|
||||
! Get the current system time from MS-DOS.
|
||||
|
||||
|
|
|
|||
|
|
@ -3,14 +3,7 @@
|
|||
! $State$
|
||||
! $Revision$
|
||||
|
||||
! Declare segments (the order is important).
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
|
||||
.sect .text
|
||||
#include "libsysasm.h"
|
||||
|
||||
! Say whether a given file descriptor number refers to a valid open file
|
||||
! descriptor.
|
||||
|
|
|
|||
|
|
@ -3,14 +3,7 @@
|
|||
! $State$
|
||||
! $Revision$
|
||||
|
||||
! Declare segments (the order is important).
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
|
||||
.sect .text
|
||||
#include "libsysasm.h"
|
||||
|
||||
! Say whether a file descriptor is ready for input, i.e. reading from the
|
||||
! fd will immediately return something.
|
||||
|
|
|
|||
|
|
@ -3,14 +3,7 @@
|
|||
! $State$
|
||||
! $Revision$
|
||||
|
||||
! Declare segments (the order is important).
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
|
||||
.sect .text
|
||||
#include "libsysasm.h"
|
||||
|
||||
! Create or truncate a file.
|
||||
|
||||
|
|
@ -18,30 +11,18 @@
|
|||
__sys_rawcreat:
|
||||
! Copy filename to transfer buffer.
|
||||
|
||||
mov ebx, esp
|
||||
push esi
|
||||
push edi
|
||||
mov esi, 4(ebx)
|
||||
movzx edi, (transfer_buffer_ptr)
|
||||
mov es, (pmode_ds)
|
||||
cld
|
||||
1:
|
||||
lodsb
|
||||
stosb
|
||||
testb al, al
|
||||
jnz 1b
|
||||
mov eax, 4(esp)
|
||||
call .sys_scpyout
|
||||
jc 9f
|
||||
|
||||
! Make the DOS call.
|
||||
|
||||
xchg edx, eax
|
||||
movb ah, 0x3c
|
||||
movzx edx, (transfer_buffer_ptr)
|
||||
movb al, 8(ebx)
|
||||
mov ebx, 0x210000
|
||||
callf (interrupt_ptr)
|
||||
movb al, 8(esp)
|
||||
call .sys_dpmidos
|
||||
|
||||
pop edi
|
||||
pop esi
|
||||
push ss
|
||||
pop es
|
||||
jmp .sys_axret
|
||||
|
||||
9:
|
||||
jmp .sys_toolongret
|
||||
|
|
|
|||
|
|
@ -3,14 +3,7 @@
|
|||
! $State$
|
||||
! $Revision$
|
||||
|
||||
! Declare segments (the order is important).
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
|
||||
.sect .text
|
||||
#include "libsysasm.h"
|
||||
|
||||
! Move the current file position for a file descriptor.
|
||||
|
||||
|
|
|
|||
|
|
@ -3,14 +3,7 @@
|
|||
! $State$
|
||||
! $Revision$
|
||||
|
||||
! Declare segments (the order is important).
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
|
||||
.sect .text
|
||||
#include "libsysasm.h"
|
||||
|
||||
! Open an existing file.
|
||||
|
||||
|
|
@ -18,30 +11,14 @@
|
|||
__sys_rawopen:
|
||||
! Copy filename to transfer buffer.
|
||||
|
||||
mov ebx, esp
|
||||
push esi
|
||||
push edi
|
||||
|
||||
mov esi, 4(ebx)
|
||||
movzx edi, (transfer_buffer_ptr)
|
||||
mov es, (pmode_ds)
|
||||
cld
|
||||
1:
|
||||
lodsb
|
||||
stosb
|
||||
testb al, al
|
||||
jnz 1b
|
||||
mov eax, 4(esp)
|
||||
call .sys_scpyout
|
||||
|
||||
! Make the DOS call.
|
||||
|
||||
xchg edx, eax
|
||||
movb ah, 0x3d
|
||||
o16 mov dx, (transfer_buffer_ptr)
|
||||
movb al, 8(ebx)
|
||||
mov ebx, 0x210000
|
||||
callf (interrupt_ptr)
|
||||
movb al, 8(esp)
|
||||
call .sys_dpmidos
|
||||
|
||||
pop edi
|
||||
pop esi
|
||||
push ss
|
||||
pop es
|
||||
jmp .sys_axret
|
||||
|
|
|
|||
|
|
@ -3,14 +3,7 @@
|
|||
! $State$
|
||||
! $Revision$
|
||||
|
||||
! Declare segments (the order is important).
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
|
||||
.sect .text
|
||||
#include "libsysasm.h"
|
||||
|
||||
! Read bytes from a file descriptor. These routines do not do any
|
||||
! translation between CRLF and LF line endings.
|
||||
|
|
@ -20,15 +13,12 @@
|
|||
|
||||
.define __sys_rawread
|
||||
__sys_rawread:
|
||||
enter 0, 0
|
||||
push esi
|
||||
push edi
|
||||
file_handle = 2*4
|
||||
write_buffer = 3*4
|
||||
amount_to_read = 4*4
|
||||
file_handle = 1*4
|
||||
write_buffer = 2*4
|
||||
amount_to_read = 3*4
|
||||
|
||||
mov eax, amount_to_read(ebp)
|
||||
mov ecx, 32*1024
|
||||
mov eax, amount_to_read(esp)
|
||||
mov ecx, TRANSFER_BUFFER_SIZE
|
||||
cmp eax, ecx
|
||||
jge 2f
|
||||
mov ecx, eax
|
||||
|
|
@ -38,41 +28,23 @@ amount_to_read = 4*4
|
|||
|
||||
movb ah, 0x3f
|
||||
o16 mov dx, (transfer_buffer_ptr)
|
||||
movzx esi, dx
|
||||
mov ebx, 0x210000
|
||||
o16 mov bx, file_handle(ebp)
|
||||
callf (interrupt_ptr)
|
||||
jnc success
|
||||
o16 mov bx, file_handle(esp)
|
||||
call .sys_dpmidos
|
||||
jc 3f
|
||||
|
||||
! Copy eax bytes out of the transfer buffer.
|
||||
|
||||
movzx ecx, ax
|
||||
mov eax, write_buffer(esp)
|
||||
call .sys_cpyin
|
||||
|
||||
xchg eax, ecx
|
||||
ret
|
||||
|
||||
3:
|
||||
! Process errors.
|
||||
|
||||
push eax
|
||||
call __sys_seterrno
|
||||
pop ecx
|
||||
jmp exit
|
||||
success:
|
||||
|
||||
! Copy eax bytes out of the transfer buffer.
|
||||
|
||||
movzx eax, ax
|
||||
mov ecx, eax
|
||||
jcxz exit
|
||||
push eax
|
||||
mov edi, write_buffer(ebp)
|
||||
mov es, (pmode_ds)
|
||||
cld
|
||||
1:
|
||||
eseg lodsb
|
||||
movb (edi), al
|
||||
inc edi
|
||||
loop 1b
|
||||
pop eax
|
||||
|
||||
exit:
|
||||
pop edi
|
||||
pop esi
|
||||
push ss
|
||||
pop es
|
||||
leave
|
||||
ret
|
||||
|
||||
|
|
|
|||
|
|
@ -3,14 +3,7 @@
|
|||
! $State$
|
||||
! $Revision$
|
||||
|
||||
! Declare segments (the order is important).
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
|
||||
.sect .text
|
||||
#include "libsysasm.h"
|
||||
|
||||
! Write bytes to/to a file descriptor. These routines do not do any
|
||||
! translation between CRLF and LF line endings.
|
||||
|
|
@ -20,15 +13,12 @@
|
|||
|
||||
.define __sys_rawwrite
|
||||
__sys_rawwrite:
|
||||
enter 0, 0
|
||||
push esi
|
||||
push edi
|
||||
file_handle = 2*4
|
||||
read_buffer = 3*4
|
||||
amount_to_write = 4*4
|
||||
file_handle = 1*4
|
||||
read_buffer = 2*4
|
||||
amount_to_write = 3*4
|
||||
|
||||
mov eax, amount_to_write(ebp)
|
||||
mov ecx, 32*1024 ! size of transfer buffer
|
||||
mov eax, amount_to_write(esp)
|
||||
mov ecx, TRANSFER_BUFFER_SIZE
|
||||
cmp eax, ecx
|
||||
jge 2f
|
||||
mov ecx, eax
|
||||
|
|
@ -36,32 +26,22 @@ amount_to_write = 4*4
|
|||
|
||||
! Copy ecx bytes into the transfer buffer.
|
||||
|
||||
push ecx
|
||||
mov esi, read_buffer(ebp)
|
||||
movzx edi, (transfer_buffer_ptr)
|
||||
mov es, (pmode_ds)
|
||||
cld
|
||||
rep movsb
|
||||
pop ecx
|
||||
mov eax, read_buffer(esp)
|
||||
call .sys_cpyout
|
||||
|
||||
! Write from the transfer buffer to DOS.
|
||||
|
||||
xchg edx, eax
|
||||
movb ah, 0x40
|
||||
o16 mov dx, (transfer_buffer_ptr)
|
||||
mov ebx, 0x210000
|
||||
o16 mov bx, file_handle(ebp)
|
||||
callf (interrupt_ptr)
|
||||
o16 mov bx, file_handle(esp)
|
||||
call .sys_dpmidos
|
||||
movzx eax, ax
|
||||
jnc exit
|
||||
|
||||
push eax
|
||||
call __sys_seterrno
|
||||
pop ecx
|
||||
exit:
|
||||
pop edi
|
||||
pop esi
|
||||
push ss
|
||||
pop es
|
||||
leave
|
||||
ret
|
||||
|
||||
! vim: sw=4 ts=4 et
|
||||
|
|
|
|||
58
plat/msdos386/libsys/sys_scpyout.s
Normal file
58
plat/msdos386/libsys/sys_scpyout.s
Normal file
|
|
@ -0,0 +1,58 @@
|
|||
#
|
||||
! $Source$
|
||||
! $State$
|
||||
! $Revision$
|
||||
|
||||
#include "libsysasm.h"
|
||||
|
||||
! .sys_scpyout: copy the ASCIIZ string starting from ds:eax to the
|
||||
! transfer buffer. The resulting ASCIIZ string, including the final null,
|
||||
! should fit into the entire transfer buffer. Return eax := offset of
|
||||
! transfer buffer in real mode data segment. Return CF = 1 if and only if
|
||||
! the ASCIIZ string is too long to fit. Preserve all other registers,
|
||||
! except the flags.
|
||||
!
|
||||
! .sys_sncpyout: copy the ASCIIZ string starting from ds:eax to offset
|
||||
! edx into the transfer buffer. The resulting ASCIIZ string should occupy
|
||||
! at most ecx bytes, including the final null. Return eax : offset of
|
||||
! string in real mode data segment. Return CF = 1 if and only if the ASCIIZ
|
||||
! string is too long to fit. Preserve all other registers, except the
|
||||
! flags.
|
||||
|
||||
.extern .sys_scpyout
|
||||
.extern .sys_sncpyout
|
||||
.sys_scpyout:
|
||||
push ecx
|
||||
push edx
|
||||
mov ecx, TRANSFER_BUFFER_SIZE
|
||||
xor edx, edx
|
||||
jmp .cont
|
||||
.sys_sncpyout:
|
||||
push ecx
|
||||
push edx
|
||||
.cont:
|
||||
push esi
|
||||
push edi
|
||||
mov esi, eax
|
||||
movzx edi, (transfer_buffer_ptr)
|
||||
add edi, edx
|
||||
mov edx, edi
|
||||
mov es, (pmode_ds)
|
||||
jcxz .error
|
||||
.loop:
|
||||
lodsb
|
||||
stosb
|
||||
testb al, al
|
||||
loopnz .loop
|
||||
jz .ok
|
||||
.error:
|
||||
stc
|
||||
.ok:
|
||||
xchg edx, eax
|
||||
mov edx, ss
|
||||
mov es, edx
|
||||
pop edi
|
||||
pop esi
|
||||
pop edx
|
||||
pop ecx
|
||||
ret
|
||||
|
|
@ -3,14 +3,7 @@
|
|||
! $State$
|
||||
! $Revision$
|
||||
|
||||
! Declare segments (the order is important).
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
|
||||
.sect .text
|
||||
#include "libsysasm.h"
|
||||
|
||||
! .sys_zret: if the carry flag is set, then set `errno' from the DOS error
|
||||
! code in ax, and return an int -1. If the carry flag is clear, just
|
||||
|
|
@ -18,14 +11,18 @@
|
|||
!
|
||||
! .sys_axret: if the carry flag is set, then set `errno' from the DOS error
|
||||
! code in ax, and return a shortword -1. If the carry flag is clear, just
|
||||
! return ax as a return value.
|
||||
! return eax := ax as a return value.
|
||||
!
|
||||
! .sys_dxaxret: same as .sys_axret, but return -1 or eax := dx:ax as a
|
||||
! return value.
|
||||
!
|
||||
! .sys_toolongret: a file name is too long: set `errno' to E2BIG, and return
|
||||
! -1.
|
||||
|
||||
.extern .sys_zret
|
||||
.extern .sys_axret
|
||||
.extern .sys_dxaxret
|
||||
.extern .sys_toolongret
|
||||
.sys_zret:
|
||||
jc error
|
||||
xor eax, eax
|
||||
|
|
@ -34,6 +31,7 @@ no_error:
|
|||
|
||||
.sys_axret:
|
||||
jc error
|
||||
movzx eax, ax
|
||||
ret
|
||||
|
||||
.sys_dxaxret:
|
||||
|
|
@ -43,6 +41,11 @@ no_error:
|
|||
mov eax, edx
|
||||
ret
|
||||
|
||||
.sys_toolongret:
|
||||
mov (_errno), 7 ! E2BIG
|
||||
or eax, -1
|
||||
ret
|
||||
|
||||
error:
|
||||
movzx eax, ax
|
||||
push eax
|
||||
|
|
|
|||
|
|
@ -3,14 +3,7 @@
|
|||
! $State$
|
||||
! $Revision$
|
||||
|
||||
! Declare segments (the order is important).
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
|
||||
.sect .text
|
||||
#include "libsysasm.h"
|
||||
|
||||
! Remove a file.
|
||||
|
||||
|
|
@ -18,29 +11,13 @@
|
|||
_unlink:
|
||||
! Copy filename to transfer buffer.
|
||||
|
||||
mov ebx, esp
|
||||
push esi
|
||||
push edi
|
||||
|
||||
mov esi, 4(ebx)
|
||||
movzx edi, (transfer_buffer_ptr)
|
||||
mov es, (pmode_ds)
|
||||
cld
|
||||
1:
|
||||
lodsb
|
||||
stosb
|
||||
testb al, al
|
||||
jnz 1b
|
||||
mov eax, 4(esp)
|
||||
call .sys_scpyout
|
||||
|
||||
! Make the DOS call.
|
||||
|
||||
mov dx, (transfer_buffer_ptr)
|
||||
xchg edx, eax
|
||||
movb ah, 0x41
|
||||
or ebx, 0x210000
|
||||
callf (interrupt_ptr)
|
||||
call .sys_dpmidos
|
||||
|
||||
pop edi
|
||||
pop esi
|
||||
push ss
|
||||
pop es
|
||||
jmp .sys_zret
|
||||
|
|
|
|||
|
|
@ -3,14 +3,8 @@
|
|||
! $State$
|
||||
! $Revision$
|
||||
|
||||
! Declare segments (the order is important).
|
||||
#include "libsysasm.h"
|
||||
|
||||
.sect .text
|
||||
.sect .rom
|
||||
.sect .data
|
||||
.sect .bss
|
||||
|
||||
.sect .text
|
||||
.use16
|
||||
exe_header:
|
||||
.data2 0x5a4d ! magic number
|
||||
|
|
@ -319,12 +313,12 @@ int21:
|
|||
o32 or ebx, 0x210000
|
||||
! Simulate interrupt in the high half of ebx.
|
||||
interrupt:
|
||||
mov (dpmi_eax), ax
|
||||
mov (dpmi_ebx), bx
|
||||
mov (dpmi_ecx), cx
|
||||
mov (dpmi_edx), dx
|
||||
mov (dpmi_esi), si
|
||||
mov (dpmi_edi), di
|
||||
o32 mov (dpmi_eax), eax
|
||||
o32 mov (dpmi_ebx), ebx
|
||||
o32 mov (dpmi_ecx), ecx
|
||||
o32 mov (dpmi_edx), edx
|
||||
o32 mov (dpmi_esi), esi
|
||||
o32 mov (dpmi_edi), edi
|
||||
pushf
|
||||
pop (dpmi_flags)
|
||||
mov ax, (rseg)
|
||||
|
|
@ -340,12 +334,12 @@ interrupt:
|
|||
xor cx, cx
|
||||
int 0x31 ! simulate DOS interrupt
|
||||
pop es
|
||||
o32 movzx eax, (dpmi_eax)
|
||||
o32 movzx ebx, (dpmi_ebx)
|
||||
o32 movzx ecx, (dpmi_ecx)
|
||||
o32 movzx edx, (dpmi_edx)
|
||||
o32 movzx esi, (dpmi_esi)
|
||||
o32 movzx edi, (dpmi_edi)
|
||||
o32 mov eax, (dpmi_eax)
|
||||
o32 mov ebx, (dpmi_ebx)
|
||||
o32 mov ecx, (dpmi_ecx)
|
||||
o32 mov edx, (dpmi_edx)
|
||||
o32 mov esi, (dpmi_esi)
|
||||
o32 mov edi, (dpmi_edi)
|
||||
push (dpmi_flags)
|
||||
popf
|
||||
ret
|
||||
|
|
@ -410,7 +404,6 @@ stack:
|
|||
.space 512
|
||||
dosstack:
|
||||
|
||||
TRANSFER_BUFFER_SIZE = 32*1024
|
||||
transfer_buffer:
|
||||
.space TRANSFER_BUFFER_SIZE
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue